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Texas Instruments LMH6720MA
- Part No.:
- LMH6720MA
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6720MA.pdf
- Description:
- IC AMP CURRENT FEEDBACK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,862
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Product details
Overview
LMH6720MA from Texas Instruments is a single-channel, current-feedback video operational amplifier with TTL-compatible shutdown control, 400MHz small-signal bandwidth (AV = +2V/V, VOUT = 500mVPP), 1800V/μs slew rate, and 0.02% differential gain error at 4.43MHz driving 150Ω - optimized for NTSC/PAL video distribution and high-speed multiplexing.
For engineers reviewing the LMH6720MA datasheet, LMH6720MA pinout, LMH6720MA application, or LMH6720MA equivalent, key selection criteria include shutdown timing (11ns turn-on / 7ns turn-off), low 5.6mA quiescent supply current, 500μA shutdown current, and SOIC-8 package compatibility with back-terminated 75Ω video loads.
Technical Context
The LMH6720MA employs Texas Instruments' VIP10 high-speed complementary bipolar process with current-feedback topology, enabling gain-independent bandwidth control via external feedback resistor (RF) tuning. Its input stage features ~180Ω inverting-input impedance and supports stable operation at gains from +1V/V to +6V/V and −1V/V to −5V/V.
Shutdown functionality is voltage-controlled (ONMIN = 2.0V, OFFMAX = 0.8V), placing the amplifier in high-impedance state (IOZ > 0.2MΩ) with 500μA total supply current (ICC = 500μA, IEE = 200μA). The device is unity-gain stable and optimized for ±4V to ±6.25V dual-supply operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 400MHz at 500mVPP output - enables full HD baseband video signal amplification without attenuation |
| Slew Rate | 1800V/μs - supports fast transient response for composite sync pulses and digital video edges |
| Differential Gain Error | 0.02% at 4.43MHz into 150Ω - meets broadcast-grade NTSC video fidelity requirements |
| Supply Current | 5.6mA typical (±5V) - balances speed and power for portable or multi-channel video systems |
| Shutdown Current | 500μA - reduces system standby power while maintaining fast reactivation (11ns) |
| Input Voltage Range | ±2.2V common-mode - accommodates standard video DC-coupled signal levels |
| Output Current | 70mA continuous - drives multiple 75Ω back-terminated lines or active filter loads |
Pinout & Package
LMH6720MA is housed in an 8-pin SOIC (D) package with exposed pad not present; thermal resistance θJA = 145°C/W. Pinout conforms to standard SOIC-8 layout with pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or grounded per layout best practice |
| 2 (−IN) | Inverting Input | Current-feedback node with ~180Ω impedance; sensitive to parasitic capacitance |
| 3 (+IN) | Non-Inverting Input | High-impedance voltage input; used for unity-gain buffer or non-inverting configurations |
| 4 (V−) | Negative Supply | Accepts −4V to −6.25V; requires local 0.1μF ceramic bypass to ground |
| 5 (OUTPUT) | Amplifier Output | Capable of 70mA drive into 100Ω; designed for 75Ω back-terminated video loads |
| 6 (NC) | No Connect | Internally unused; no routing or connection required |
| 7 (SD) | Shutdown Control | TTL-compatible input: <0.8V = disabled, >2.0V = enabled; controls high-Z output state |
| 8 (V+) | Positive Supply | Accepts +4V to +6.25V; requires local 0.1μF ceramic bypass to ground |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible shutdown pin | Enables fast, logic-level controlled power gating (11ns on / 7ns off) for time-multiplexed video routing |
| 0.1dB gain flatness to 120MHz | Preserves chroma/luma amplitude relationships across full NTSC/PAL baseband spectrum |
| Low 3rd harmonic distortion (−70dBc @ 20MHz) | Minimizes color artifacts and cross-luminance interference in composite video signals |
| Unity-gain stable architecture | Supports direct use in buffer, cable driver, and active filter configurations without compensation |
| Improved replacement for CLC405 | Provides pin-compatible upgrade path with superior bandwidth, lower power, and integrated shutdown |
Applications
| HDTV Video Distribution | Video Multiplexer |
|---|---|
Use Scenario: Routing uncompressed HD-SDI or analog component video across multiple displays in broadcast trucks or studio switchers. IC Role / Device Role / Timing Role: High-speed buffer and level-shifter between source and distribution amplifiers, operating at 75Ω impedance match. Use Value: 400MHz bandwidth and 0.02% differential gain ensure minimal color shift and timing jitter across 1080i/1080p signals. | Use Scenario: Selecting one of several camera feeds for real-time display or recording using digital control signals. IC Role / Device Role / Timing Role: Analog switch element with TTL-controlled shutdown, enabling channel isolation during switching transitions. Use Value: 7ns shutdown time and high-Z output state prevent crosstalk and ghosting between active/inactive channels. |
| Programmable Gain Amplifier | Cable Equalization Driver |
Use Scenario: Digitally adjusting video signal amplitude in medical imaging or test equipment with precision gain steps. IC Role / Device Role / Timing Role: Core gain block in digitally controlled PGA topology, configured with discrete resistor networks for each gain code. Use Value: Stable performance across +1V/V to +6V/V range and low 5.6mA supply current enable compact, low-power gain control. | Use Scenario: Compensating high-frequency loss in long coaxial runs (>50m) for security camera or industrial vision systems. IC Role / Device Role / Timing Role: Active equalizer stage with peaking RC network in feedback loop to counteract cable roll-off. Use Value: 1800V/μs slew rate and wide bandwidth preserve edge integrity in digital video over coax, reducing bit errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6720MF/NOPB.A | 6-pin SOT-23 package, same electrical specs, higher θJA (198°C/W), no NC pins | Better suited for space-constrained PCBs; requires different layout and thermal management | Select when board area is critical and thermal margin allows for higher junction temperature rise |
| CLC405 (discontinued) | Legacy current-feedback op amp; no shutdown function; 200MHz bandwidth; higher 10mA supply current | Lacks logic-controlled power gating; unsuitable for dynamic channel switching or low-power standby | Use only for legacy redesign where shutdown and bandwidth improvements are not required |
Compared with LMH6720MF/NOPB.A, the LMH6720MA offers superior thermal performance (θJA = 145°C/W vs. 198°C/W) and SOIC-8 compatibility with existing footprint designs; versus CLC405, it delivers 2× bandwidth, 44% lower supply current, and integrated shutdown - making it the preferred choice for new video infrastructure designs.
Availability
LMH6720MA is available at Aetrix Electronics and suitable for HDTV distribution systems, broadcast-quality video multiplexers, and programmable gain amplifiers requiring stable component supply, long-term manufacturability, and TI-qualified production lots.
Supply support for LMH6720MA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in high-speed amplifiers and video signal conditioning.
The LMH6720MA belongs to TI's LMH67xx wideband video op amp family, engineered specifically for broadcast, professional video, and high-fidelity analog signal routing applications demanding low distortion, precise gain flatness, and fast switching capability.
FAQ
What is the recommended feedback resistor value for LMH6720MA in a non-inverting gain-of-2 configuration?
The LMH6720MA datasheet specifies a 300Ω feedback resistor (RF) for optimal bandwidth and stability at AV = +2V/V with ±5V supplies. This value delivers near-maximal 400MHz small-signal bandwidth and 0.1dB gain flatness to 120MHz. Deviating significantly - especially below 200Ω - risks peaking, overshoot, or oscillation due to the current-feedback architecture's sensitivity to RF.
Does LMH6720MA support single-supply operation?
The LMH6720MA is characterized for dual-supply operation (±4V to ±6.25V) and does not support true single-supply use. Its input common-mode range is ±2.2V and output swing is limited to ±3.4V into 100Ω - incompatible with rail-to-rail input/output requirements of 0V–5V or 0V–12V systems. For single-supply video applications, consider TI's THS3201 or similar rail-to-rail alternatives.
How does the shutdown function affect output impedance in LMH6720MA?
When disabled, the LMH6720MA places its output in a high-impedance state (IOZ = 0.2–1.8MΩ), isolating downstream circuitry. However, effective off-isolation depends on external feedback components: in inverting configurations, RF and RG dominate the output impedance path. Therefore, for maximum channel separation in multiplexers, minimize RF and avoid capacitive loading on the inverting input.
Can LMH6720MA drive a 75Ω back-terminated load directly?
Yes - the LMH6720MA is explicitly characterized for 150Ω video loads (equivalent to two 75Ω terminations in parallel) and delivers 0.02% differential gain error at 4.43MHz. Its 70mA continuous output current and low 0.06Ω closed-loop output resistance ensure stable 75Ω matching without external series resistors, preserving signal integrity in broadcast video chains.
What is the thermal performance difference between LMH6720MA and LMH6720MF/NOPB.A packages?
The LMH6720MA (SOIC-8) has a junction-to-ambient thermal resistance (θJA) of 145°C/W, while the LMH6720MF/NOPB.A (SOT-23-6) is rated at 198°C/W. Under identical 5.6mA supply current and ambient conditions, the SOIC-8 package runs ~53°C cooler - a critical advantage in thermally dense video boards or multi-channel amplifier arrays where junction temperature directly impacts distortion and long-term reliability.
LMH6720MA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- VIP10™
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Current Feedback
- Output Type:
- -
- Number of Circuits:
- 1
- -3db Bandwidth:
- 400 MHz
- Slew Rate:
- 1800V/µs
- Current - Supply:
- 5.6 mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply, Single/Dual (±):
- 8V ~ 12.5V, ±4V ~ 6.25V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
LMH6720MA FAQ
1.How can I place an order for LMH6720MA through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6720MA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMH6720MA reliable?
The price and inventory of LMH6720MA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6720MA is usually 5 days.
3.What payment methods are accepted for LMH6720MA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6720MA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6720MA?
LMH6720MA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6720MA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMH6720MA?
For technical support, including LMH6720MA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6720MA requirements.
6.How does Aetrix verify that LMH6720MA is sourced from the original manufacturer or authorized distributors?
All LMH6720MA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMH6720MA meets industry standards.
7.What is the process for return or replacement of LMH6720MA?
All LMH6720MA units undergo pre-shipment inspection (PSI). If there is an issue with LMH6720MA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMH6720MA part is unused and in its original packaging.
Return procedure for LMH6720MA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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